Automatic station selector



Dec 10, 1935. R BQWERMAN 2,023,510

AUTOMATIC STATION SELECTOR Filed March 12, 1934 5 Sheets-Sheet 1 INVENTOR. Rosco: BowzR/wnrv.

Dec. 10, 1935. R. BOWERMAN AUTOMATIC STATION SELECTOR Filed March 12, 1934 5 Sheets-Sheet 2 0 a m m M E E mi T M N 1 i N R I "i E R O .1 i V E W I u! N w I u. I A a .4 Z o F #2 B 3 E #n C fi a" E L O "nu a law u 0 05mm R III!!! |||r ill 13721701" III Dec. 10, 1935. R. BOWERMAN I AUTOMATIC STATION SELECTOR 1934 3 Sheets-Sheet 3 Filed March 12 I l l flfl l dlml wi l N ,mm NR WM m0 3 E O C u n ATTO NEY.

Patented Dec. 10, 1935 "PATENT OF'F l C E AUTOMATIC STATION SELECTOR Roscoe Bowerman, Los AngelesjCalif.

Application March '12, 1934, Serial No. "715,156

"12 Claims. (01:250-20) This invention relates to automatic station-selectors.

The general object of this invention'isto provide an improved device for automatically'tuning aradio receiving set.

A further object is to provide a tuning control which may beset to select certain desired stations "at predetermined times 'each day and to select other stationsat predetermined other times.

Another object is'to provide an improved automatic tuning mechanism for a radio set which will operate continuously without resetting orrewinding.

Other objects and'the advantages of thisinvention will beapp'arent from the following 'description taken in connection with the accompanying drawings wherein:

Fig. lis a side elevation of my improved radio control;

"Fig. '2 is a' top plan view of my control;

'Fig. "3 is anenlarged'fragmentary section'of my device;

Fig. 4 is a section taken online' 4- 4 of Fig. 3;

Fig. '5 is an enlarged section taken on line 5-5 of Fig. showing the reset mechanism;

Fig. -6 is asection taken on line6--6'o'f Figi-5;

Fig. Tisan enlarged section taken on Iirie of Fig. 3 showing the motor reversing switch;

Fig. '8 is a side elevation of the shiftingmechainism;

Fig.9 is an enlarged section taken on line 9-9 of Fig.'10;

Fig. 10 is a section taken on line ill-l0 of Fi .3;

Fig. 11 is an enlarged section of the clock switch;

Fig. 12 is a section taken on line l2-|2 of Fig. 11;

Fig. 13 is a front elevation of my time switch contact mounting;

Fig. 14 is a section taken on line l4-l4 of Fig. 4;

Fig. 15 is an enlarged section of 'myradio'control switch;

Fig. 16 is an enlarged bottom view of one of my time pins;

Fig. 1'7 is a section taken'on line ll-l'l of Fig. 10; and,

Fig. 18 is a wiring diagram of my radio-control.

Referring to the drawings by reference characters I have indicated my radio receiver control generally at"! (Fig. 1). As shown the control device I0 includes a circular table bodyfportion H.rnounted on an upright standard l2 which is secured to suitable'legs l3. The body I l includes ed acylindrical'top support 19.

a bottom member I 4 on which a cylindricalwall covers '20 are rabb'eted'as at 23 to receive'seg- 'mental panes of glass 24.

Mounted at the center or the partition "3' 1 provide an upright standard-25 which is secured in 15 place-by bolts 26. The standard 25 terminates in 'aboss-'21 which removably' secures a lid "28in p-lac'e fiushwithth'e covers 20. The underperiphery of the lid- 28 is rabbeted' as at 29 to receive'a depending skirt 30 which issecure'd thereto. Cover stops 3l :are secured'to the skirt to hold the covers 20 inproper position.

-'Mounted on thespartition l6 and-coaxial with the support Iprovide a circular bearing support-32. Rotatably positioned about the stand- 25 ard '-25 1 J provide a control disk '33 made of electrical insulation-material which is supported'by bearings 34 mounted on the flange l'8. An upstanding circula'r drum 36 is mounted upon the disk 33 and adapted to rotate therewith. 'On the drum'36 I provide a plurality of sets of condenser rotor plates 31 shown as four in number in'the accompanying drawings.

On the'standar'd 25 I" fixedly secure ahub '38 u'ponwhich are sec'ureda plurality of sets of 3 condenserstationary plates39=which are interspacedwith'therotorplates 31. Thus it'is seen 'that whenthe control disk 33 isrotated'the 'capacity between the rotor and statoriplateswill increase for the *fir'st 45rotation, decrease for 40 the'next rotation, then increase forthe next 45. rotation, ands'o' on, increasing and decreasing four times each' rotation.

A radio receiving set is positionedin the body portionl'l below the partition 1'6. The sets of 45.

condenser plates'31 and 39 are suitably connected to thereceiving set E1] as by wires-4| and M, as shown in Fig. 18, and I. is a'dapte'd to serve'as the station selector. Thus as the control disk-rotates 'to predetermined ;positions "the receiving set is tuned to predetermined frequencies.

To resiliently urge the control'disk- 33 to rotate in a counter 'elockwise direction I provide a spring 43 having one end secured to the standard 25 'by a sc'rew fl and having the-other endserights 64 is threaded as at I2.

cured to a drum 45 which is in turn secured to the underside of the control disk, 33.

To rotate the control disk 33 to a wound position I provide a rewind motor 46 mounted on the partition I6. This motor includes a shaft 41 having a friction pulley 43 secured thereto which engages the outer surface of the drum 45. For actuating the rewind motor 46 I provide a switch 49 which includes an operating arm 50. The arm 50 is adapted to be actuated by an arm 5| secured on the disk 33.

On the control disk 33 I provide a plurality of outer arcuate slots 52 and a plurality of inner arcuate slots 53 (see Fig. 4) in which are movably positioned a plurality of knurled station selector buttons 54. The buttons 54 are threaded as at 55 to receive a nut 56 (see Fig. 5). The slots 52 and 53 at the lower edge include a rabbet 51 on each side which is engaged by a portion of the nut 56. Each button 54 is apertured as at 58 to receive a stop pin 59 which includes a knurled head 60 and anoutwardly extending reset arm 6I. The nut 56 includes a shoulder 62 against which the arm BI is adapted to be positioned.

To allow the control disk 33 to intermittently rotate as to be hereinafter described I provide an oscillating stop plate 63 (Figs. 3, '7 and 8) which is supported by uprights 64 which are grooved as at 65 to receive the plate 63. The uprights 64 are suitably mounted to the partition I9. For shifting the plate 63 I provide a reversible motor 96 which includes a shaft 6'! which is connected by a coupling member 68 to a drive shaft 69 positioned in bearings II integral with the uprights 64. The portion of the shaft 69 between the up- An internally threaded lug I3 is positioned on the threads I2 and includes upwardly extending Wings I4 secured to the plate 03 as by rivets I5.

Adjacent the shaft 69 I provide a snap-over motor reversing switch I6 mounted on the parti tion I6. The switch I6 includes a suitable housing 11 on which a switch arm 18 is pivotally mounted as at 19. A spring has one end secured to the lower portion of the housing 11 and the other end secured to the upper end of the arm 78 and is adapted to resiliently hold the switch arm 18 in either a right or left position. The switch arm I8 includes a pair of contact bars 8| and 82 which are adapted to bridge pairs of contacts 83 and 84, and 85 and 86, respectively, when in one position and to bridge pairs of contacts 81 and 88, and 89 and 90, respectively, when in the other position. A switch operating bar M is secured to the lug 13. The operating bar 9I includes outstanding ends 92 which are adapted to engage the arm 18 to actuate the switch 16.

Circumferentially arranged in the annular flange I8 I provide a plurality of time pins 93 which include polygonal middle portions 95, and cylindrical lower portion 96. Below the flange I8 an annular contact support 91 made of insulating material is positioned; The support 91 is provided with a plurality of polygonal apertures 98 which are spaced to receive the portions 95 and 95 of the pins 93. Adjacent each aperture 98 I provide a pair of contacts 99 and I00. The pin 93 is adapted to move vertically in an aperture IOI in the flange I8.

The pins 93 each include a quadrant shaped contact plate I02 (Fig. 17) which is adapted to bridge the contacts 99 and I00 mounted in the support 91. Reset arms I03 are also provided in the pins 93.

Mounted in the wall member I5 I provide a clock I04 which includes a shaft I05 which is driven at the rate of one revolution every twentyfour hours. A disk I06 is secured to the shaft I05 and is adapted to rotate therewith. Back of the disk I06 I provide a contact bracket I01 provided with two circular rows of contacts I08 and I99 (see Fig. 11) and a. circular ratchet rack I I0.

Mounted on the disk I06 I provide a housing I I3 having a recess I I4 therein in which bar I I 5 is slidably mounted. The bar H5 is normally urged towards the center of the disk by a coiled spring II6 one end of which engages the bar H5 and the opposite end a screw plug III provided to close the recess I I4. Mounted on the bar II5 I provide a contact blade IIB which extends out of the housing I I 3 through an aperture I I9 therein. As the disk I06 rotates the blade H8 is caused to rise on the teeth of the ratchet H0 and then descend making a momentary connection between successive pairs of the contacts I08 and I09.

To turn off the radio set when it is no longer desired to have it play I provide a switch I20 -(see Figs. 14 and 15) mounted on the drum 32 and a similar switch I2I mounted on a bracket I22. These switches are operated by a plurality of stop pins I23 which are mounted on the disk 33 on the same radius as the selector pins 58 (see Figs. 14, 15 and 16). As shown the stop pins I23 are mounted in apertures I24 in the disk 33 and in apertured plugs I25 which are secured to the disk 33 and include shoulders I26 similar to the shoulder 62 of the nuts 56. Each of the stop pins I23 includes a reset arm I21 and a quadrantal switch operating arm I28.

Each of the switch members I23 includes a rigid contact arm I29 and a flexible contact arm I30. As shown in Fig. 18 the contact arms I30 are connected by a wire I3I and one of the contact arms I29 is connected by a wire I32 to a source of electrical energy which is shown as a battery I33 while the other contact arm I 29 is connected by a wire I34 to one power terminal of the radio set 40. The other power terminal of the radio set is connected by a wire I 35 to the opposite side of the battery I33. The wire I35 preferably has a control switch I36 interposed therein between the radio set and the battery.

From the foregoing is will be apparent that when. the switch operating arm I28 of one of the stop pins I 23 engages the resilient contact arm I39 of one of the switches I20 and moves it out of engagement with its associated rigid contact arm i29 the power circuit from the battery I33 to the radio set will be broken whereupon the radio set will cease to operate until the stop pin I 23 passes the switch I20 thereby allowing the resilient contact arm I30 to again engage its associated contact arm I29.

The snap-over switch 16 is suitably wired to the motor 55 so that in one position of the contact arms current goes through the motor field to operate the motor in one direction and when the contact arms are in the other positions the current is reversed through the motor field to operate the motor in a reverse direction. As shown the field contacts 04 and are connected by wires I35 to one field terminal of the motor 65 and the other field. contacts. 85 and 87 are connected by wires I33 to the other field terminal of the motor. The brush contacts 93 and 88 are connected by wires I3! to one of the motor brushes and the brush contacts 85 and 89 are connected by wires I 30 to the other motor brush. Electric current is directed by a wire I 39 from the wire I36 to one terminal of the motor 66. The other terminal of the motor 66 is connected by a wire I40 to one end of an electro-magnetic coil I4I, the opposite end of which is connected by a wire I42 to a contact I43 and by a wire I44 to each of the contacts I00. The associated contacts 99 are each connected by a wire I45 to one of the contacts I09 of the clock switch. The track I08 of the clock switch is connected by a wire I46 to the wire I 32.

Adjacent the coil III I provide a pivoted arm I41 having an armature plate I48 and a contact I49 thereon. The contact arm I41 is connected by a wire I50 to the wire I46. At one predetermined point on the clock switch I provide a contact member I5I which is connected by a wire I52 to one terminal of the rewind motor I04, the other terminal of the motor being connected by a wire I53 to one terminal of the switch 49 and the other terminal of the switch is connected by a wire I54 to the wire I39. The clock I 04 is shown as operatively connected to the battery I33 by wires I55 and I56.

To cause operation of the radio set regardless of the condition of the control device I I provide a switch I51, one terminal of which is connected by a wire I58 to the wire I32 and the other terminal is connected by a wire I59 to the wire I33.

When the device is first set for operation the station selector buttons 60 are positioned on the disk 33 so that when they are in a position adjacent the plate 63 the condenser is in the correct position to tune in the correct station. After correctly positioning the selector pins 59 the bolts 54 are screwed into the nuts 55 to firmly clamp them in position on the disk 33. When it is desired to have a certain station play at a predetermined time the selector pin representing the desired station is moved downwardly so that the end of the pin 59 projects below the upper edge of the plate 63 and at the same time the pin 93 indicating the time it is desired to have the station play is pushed down so that its contact arm IOI bridges the associated contacts 99 and I90 thus closing the circuit at that point from the wire I44 to the wire I45,

Thus when the contact blade II8 of the clock switch makes contact between the contact ring I 98 and the contact I99 connected by the wire I45 to the bridge pair of contacts 99 and I00 current momentarily fiows from the battery I33 through the wires I32 and I46 to the contact ring I98 thence through the contact 99 through the contact arm I02 to the contact I00 and thence through the wire I44 to one end of the coil MI. The current then passes through the coil MI and the wire I40 to the motor 66 and from the motor through the wires I39 and I35 to the battery thereby energizing the coil MI. When the coil I M is energized it attracts the armature I 48 on the arm I41 towards itself. thereby engaging the contacts I43 and I49. Thereafter the current flows through the wires I32 and I50 to the arm I41 and through the contacts I43 and I49 to the wire I40 thereby retaining the coil I4I energized and at the same time operating the motor 66. As the motor '56 operates it rotates the shaft 6-9 which through the medium of the threads 12 moves the plate 63. As the plate 63 is thus moved it moves out of the path of one of the outer pins 59 into the path of the inner pins.

As the plate 63 moves out of the path of one of the outer pins which has been engaging it the spring 43 rotates the disk 33 until one of the inner pins 59 which represent the before mentioned selected station engages the plate 63 whereupon the disk ceases to revolve whereupon the condenser being in the correct position to bring in the desired station the radio set will play that station. When the plate 63 has travelled into the path of the inner pins 59 the snap-over switch 15 is operated to reverse the motor field and in so doing breaks the electrical connections from the battery through the motor thereby breaking the circuit to the coil I4I whereupon the contact I49 is moved out of. engagement with the contact I43 thus opening the circuit from the battery to the motor.

Te automatically move the pins 59 upward after the stations have been played I provide a. roller I60 which is supported in brackets I6I on the partition I5. When pins which have been moved downward pass the roller I60 the roller moves them upward to a position wherein they are above the upper edge of the plate 63 and consequently will not engage the plate when they are again in line with it.

For automatically moving the pins 59 downward again after they have been moved upward by a roller I69 I provide a reset device I62 (see Figs. 5 and 6). As shown the reset device I62 comprises a disk I63 freely mounted on a shaft I64 which is rotatably supported in bearings I65 mounted on the partition I6. On each side of the disk I59 I secure a hub I529 to the shaft I64 and on the hubs I provide a spring member I66 which in turn engages the sides of the disk I63. Also secured to the hubs I64 I provide an arm I68 the outer end of which includes projecting side fingers I69 and adjacent the outer end of the arm I provide thereon a roller I10.

The disk I63 engages the under-face of the disk 33 so as the disk 33 revolves in an operative direction the disk is rotated thereby which through the frictional engagement of the disk I91 and the spring members I65 moves the arm I69 upward to a position wherein the roller I10 engages the under-face of the disk 33 as shown in Fig. 6.

When it is desired to have the pins 59 automatically moved downward by the reset device I62 the pins 59 are turned so that the arms 6| thereon extend radially towards the opposite row of pins 59. Thus when the pins pass the reset device I02 the fingers I69 on the arm I53 engage the pin arms 6i and force them downward until they pass under the fingers I69. When it is not desired to have the pins 59 moved downward by the reset device I 62 the pins 59 are turned so that the arms 6I thereon are moved out of the path of the reset device.

To automatically reset the buttons 93 to again bridge the contacts 99 and I00 I provide a reset device I12 which is similar to the reset device I62 except that the spring fingers and arm I13 which is similar to the arm I68 need be only on one side.

The device I12 includes a bracket I15 which is mounted on the disk 33 and the arm I13 thereof includes a finger II I extending from one side thereof which is adapted to engage the fingers I93 oi the buttons 93 and move them downward as previously described in connection with the reset device I62. Extending from the bracket I15 in a direction opposite to the arm I13 I provide an arm I16 on which a roller I11 is rotatably mounted. In operation the finger I14 moves the pins 93 downward to bridge the contacts 99 and I00 and then after the station controlled by that particular pin 93 plays and the disk 33 revolves a predetermined distance the roller I11 moves the pin 93 up. If it is desired not to have the buttons 93 automatically reset the buttons should be turned so that the arms I03 thereon are out of the path of the finger I14 of the reset device 412.

When the contact arm IIB of theclock switch bridges between the contact ring I38 and the contact I5! current flows from the battery I33 through the wires I35, I39 and I54 to the switch which is closed thence through the switch and the wire I 53 to the rewind motor 46. Then from the motor through the wire I52, the contact I5I and the contact arm H8 to the contact ring I58 and thence through the wires M6 and I32 to the opposite side of the battery thereby causing the rewind motor 46 to operate.

As the motor 46 is thus operated the disk 33 is rotated in a clockwise direction until the arm 5| on the disk 33' engages the arm 53 of the switch 49 and moves it to an open position thereby breaking the circuit to the rewind motor 49. When the disk 33" again rotates in an operative direction the arm" 5i on the disk 33 moves out of engagement with the switch arm 53 whereupon the switch 49 again I closes.

From the foregoing it will be apparent that I have invented a novel automatic station selector which is highly efiicient in use and which can be economically manufactured.

Having thus described my invention, I claim:

1. In a station selector, a time switch, a rotatable disk, station selectors adjustably mounted on said disk, selector pins movable on said station selectors from an operative to an inoperative poi sition, stop means, means operated by said time switch'to project said stop means in the path of movement of the operative selector pins, means to lift said selector pins after said stop means has become disengaged therefrom and a reset arm mounted on each of said selector pins, a reset device, said reset arms being shiftable from operative to inoperative position, said reset arms in operative position being disposed in the path of movement of said reset device.

2. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, means to vary the reactance of said circuit, said means including a disk, resilient means to normally urge said disk 1 to rotate in one direction, a plurality of movable pins on said disk, a stop engaging an active one of said pins, electro-magnetic means to move said stop from engagement with one active pin and allow said disk to rotate a predetermined distance until the stop engages a second active pin to vary the reactance of said circuit a predetermined amount, means to energize said electromagnetic means at predetermined times, said energizing means including a source of electrical energy, a time switch including a plurality of segments successively connected with said source, and a plurality of switches each having one terminal connected with one of said segments, the other terminal of said switches being connected to said electro-magnetic means, whereby when the switch associated with the segment connected with said source is closed said electro-magnetic means is caused to-operate.

3.In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of contacts spaced circumferentially about said support, a time switch, a source 3 ofelectricity', means operated by said time switch to connect said contacts consecutively and atregular intervals to the source of electricity, a-

time pin" associated with each pair of spaced contacts, said time pins being rotatably and slidably mounted, each contact pin having a contact plate thereonadapt'ed to bridge said contacts when the contact pinis in a depressed position, a disk rotatably' mounted on said support, said diskentially spacedstation selector buttons mounted in said concentric slots, a selector pin slidably mounted in each of said buttons, a stop plate, means to mount said stop plate for movement, and means whereby when a contact plate bridges its spacedcontacts and said time switch functions to pass current through said contact said stop plate will be moved, said stop plate being movable from a position whereby it engages first one selector pin and then another selector pin.

4; In a stationselector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality" of pairs of contacts spaced circumferentiallyabout' said support, a time switch, a source of electricity, means operated by said time switch to connect said contacts to the source of electricity, a time pin associated with each pair of spaced contacts, said time pins being movably mounted, each contact pin having a contact plate thereon adapted'to bridge said contacts when the contact pin is moved, a disk rotatably mounted on said support, a standard fixed upon said support, said disk having concentric slots therein,

a plurality of interspaced rotary condenser plates o-n'said'standard, a plurality of interspaced rotary condenser plates mounted on said disk, said disk having a pluralityof selector pins movably mounted in said concentric slots, a stop plate, means to mount said stop plate for movement, and means whereby when a contact plate bridges its spaced contacts and said time switch functions to pass current through said bridged contact, saidstop plate will be moved, said stop plate being movable from a position whereby it engages one'stop pin to a position where it'engages another stop pin, whereby when said time pins are moved and said time switch functions said stop plate will reciprocate to alternately engage the moved selector pins.

5; In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of contacts spaced circumferentially about said support, a time switch, a source of'electricity, means operated by said time switch to connect said contacts to the source of electricity, a time pin associated with each pair of spaced contacts, said time pins being movably mounted, each contact pin having a contact plate thereon adapted to bridge said contacts when the contact pin is moved, a disk rotatably mounted'on said support, a standard fixed upon said support, a plurality of stationary condenser plates on said standard, a plurality of interspaced rotary condenser plates mounted on said disk, said disk having concentric slots therein,'a plurality of station selector buttons movably mounted in said slots, a selector pin movably mounted in each'of said buttons, a stop plate, means to movably mount said stopv plate, and means whereby when a contact plate bridges its spaced'contacts and said time switch functions to pass current through said bridged contact said stop plate will be moved from a position whereby it engages one stop pin to a position where it engages another stop pin, whereby when said time pins are moved and said time switch functions said stop plate will move to alternately engage the moved selector pins on the selector buttons.

6. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, .a base member, an annular support on said base member, a plurality of pairs of contacts spaced circumferentially about said support, a time switch, a source of electricity, means operated by said time switch to connect said contacts consecutively and at .1 regular intervals to the source of electricity,

condenser plates on said standard, a plurality of, winter-spaced rotary condenser plates mounted on said disk, means to normally urge said disk in one direction, said disk having a plurality of station selector pins slidably mounted in said concentric slots, a stop plate, means to mount said stop plate for oscillating movement, and means where- 'by when a contact plate bridges its spaced contacts and said time switch functions to pass current through said contact said stop plate will be shifted, said stop plate being movable from a position whereby it engages one station selector to a position whereby it engages another station selector pin whereby when said time pins are moved and said time switch functions said stop plates will reciprocate to alternately engage selector pins.

7. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of contacts spaced circumferentially about said support, a time switch, a source of electricity, means operated by said time switch to connect said contacts consecutively and at regular intervals to the source of electricity, at time pin associated with each pair of spaced contacts, said time pins being rotatably and slidably mounted, each contact pin having a contact plate thereon adapted to bridge said contacts when the contact pin is in a depressed position, adisk rotatably mounted on said support, a standard fixed upon said support, a plurality of stationary condenser plates on said standard, a plurality of interspaced rotary condenser plates on said disk, means to normally urge said disk in one direction, said disk having a pair of concentric slots therein, a plurality of station selector buttons slidably mounted in said slots, means to secure said buttons in adjusted position, a selector pin slidably mounted in each of said buttons, a stop plate, means to mount said stop plate for oscillating movement, and means whereby when a contact plate bridges its spaced contacts and said time switch functions to pass current through said contact said stop plate will be shifted, said stop plate being movable from a position whereby it engages a stop pin in the outer slot to a position where it engages a pin on the inner slot, whereby when said time pins are depressed and said time switch functions said stop plates will reciprocate to alternately engage the depressed selector pins on the outer and inner selector buttons.

8. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of contacts spaced circumferentially about said support, a time switch, a source of electricity, means operated by said time switch to connect said contacts to the source of electricity, a time pin associated with each pair of spaced contacts, said time pins being movably mounted, each contact pin having a contact plate thereon adapted to bridge said contacts when the contact pin is moved, a disk rotatably mounted on said support, a standard fixed upon said support, a plurality of stationary condenser plates on said standard, a plurality of interspaced rotary condenser plates mounted on said disk,

' means to normally urge said disk in one direction, said disk having a pair of concentric slots therein, a plurality of station selector buttons movably mounted in said slots, means to secure said buttons in adjusted position, a selector pin movably mounted in each of said buttons, a stop plate, means to mount said stop plate for oscillating movement, and means whereby when a contact plate bridges its spaced contacts and said time switch functions to pass current through said bridged contact said stop plate will be shifted,

said stop plate being movable from a position whereby it engages a stop pin in the outer slot to a position where it engages a pin on the inner slot, whereby when said time pins are moved and said time switch functions said stop plate will reciprocate to alternately engage the moved selector pins on the outer and inner selector buttons.

9. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of spaced contacts, a time switch, a source of electricity, means operated by said time switch to selectively connect pairs of said contacts to the source of electricity, a time pin associated with each pair of spaced contacts, each time pin having a contact plate thereon adapted to bridge said contacts when the time pin is moved in one direction, a reset arm on each contact pin, a disk rotatably mounted on said support, a condenser member on said disk, means to move said disk, said disk having a pair of concentric slots therein, a plurality of station selector buttons slidably mounted in said slots, means to secure said buttons in adjusted position, a selector pin movably mounted in each of said buttons, an outwardly extending reset arm on each of said selector pins each of said buttons including a shoulder adapted to be engaged by said selector reset arm, said shoulders being disposed so that the adjacent selector reset arm may be directed towards each other, a stop plate, means to mount said stop plate for oscillating movement, said means including a reversible motor, and means whereby when a contact plate bridges its spaced contacts and said time switch functions to pass current through the bridged contacts said motor will operate to shift said stop plate from a position where it engages a stop pin in one slot to a position where it engages a stop pin in the other slot, whereby when said time pins are depressed and said time switch functions said stop plate will reciprocate to alternately engage the moved selector pins on the outer and inner selector buttons.

10. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of spaced contacts, a time switch, a source of electricity, means operated by said time switch to selectively connect pairs of said contacts to the source of electricity, a time pin associated with each pair of spaced contacts, each time pin having a contact plate thereon adapted to bridge said contacts when the time pin is moved in one direction, a reset arm on each contact pin, a disk rotatably mounted on said support, a condenser member mounted on said disk, means to move said disk, said disk having a pair of concentric slots therein, a plurality of station selector buttons slidably mounted in said slots, means to secure said button in adjusted position, a selector pin slidably and rotatably mounted in each of said buttons, an outwardly extending reset arm on eac of said selector pins each of said buttons including a shoulder adapted to be engaged by said selector reset arm, said shoulders being disposed so that the adjacent selector reset arm may be directed towards each other, a stop plate, means to oscillate said stop plate, said means including a motor, and means whereby when a contact plate bridges its spaced contacts and said time switch functions to pass current through the bridged contacts said oscillating means will shift said stop plate, whereby when said time pins are depressed and said time switch functions said stop plate will reciprocate to alternately engage the depressed selector pins on the outer and inner selector buttons.

11. In a station selector adapted to operate in conjunction with a radio receiving set having a circuit including a condenser, a base member, an annular support on said base member, a plurality of pairs of contacts spaced circumferentially about said support, a time switch, a source of electricity, means operated by said time switch to connect said contacts consecutively and at regular intervals to the source of electricity, a time pin associated with each pair of spaced contacts,

said time pins being rotatable and slidably mounted, each time pin having a contact plate thereon adapted to bridge said contacts when the time pin is in a depressed position, a reset arm on each contact pin, a disk rotatably mounted on said support, a standard fixed upon said support, a plurality of stationary condenser plates mounted on said disk, means to normally urge said disk in one direction, means to reset said urging means, said disk having a pair of concentric slots there- 10 in, a plurality of station selector buttons slidably mounted in said slots, means to secure said buttons in adjusted position, a selector pin slidably and rotatably mounted in each of said buttons, an outwardly extending reset arm on each of said selector pins each of said buttons including a shoulder adapted to be engaged by said selector reset arm, said shoulders being disposed so that the adjacent selector reset arm may be directed towards each other, a stop plate, means to mount said stop plate for oscillating movement, said means including a reversible motor, and means whereby when a contact plate bridges its spaced contacts andsaid time switch functions to pass current through the bridged contacts said 5 motor will operate to shift said stop plate from a position where it engages a stop pin in one slot to a position where it engages a stop pin in the other slot, whereby when said time pins are depressed and said time switch functions said stop plate will reciprocate to alternately engage the depressed selector pins on the outer and inner selector buttons.

12. In a station selector, a time switch, a member movable to different positions to tune in dif ferent stations, station selectors adjustably mounted on said member, selector members movable on said station selectors from an operative to an inoperative position, stop means, means operated by said time switch to project said stop means in the path of movement of the operative selector members, means to shift said selector means after said stop means has become disengaged therefrom and a reset member mounted on each of said selector members, a reset device, said reset members being shiftable from operative to inoperative position, said reset members in operative position being disposed in the path of movement of said reset device.

ROSCOE BOWERMAN. 

